lib C
  fun strtoll(s : UInt8*, p : UInt8**, b : Int32) : Int64
end

class String
  def to_i64
    C.strtoll(self, nil, 10)
  end
end

def tri(x)
  x * (x + 1) // 2
end

def calc(x, d)
  x < 0 ? 0i64 : tri(d.pred) * (x // d.pred) + tri(x % d.pred)
end

read_line.to_i.times do
  d, a, b = read_line.split.map(&.to_i64)
  puts calc(b, d) - calc(a - 1, d)
end